Flour sifter attachment for electric motors



Sept. 5, 1950 o. c. BOND 2,521,034

FLOUR SIFTER ATTACHMENT FOR ELECTRIC MOTORS Filed April 22, 1947 18 za Z9 Z6 Z5 .30 16 z P l 15 i 14 27 45 46 Z7 44 Z0 43 I 40 Z3 39 Q J 338 3 I Q1 K 5 i Hlllll \H IN VEN TOR.

URI AL CI BOA/0 ATTORNEYS Patented Sept. 5, 1950 UNITED STATES PATENT- FLOUR SIF-TER." ATTACHMENT FOR ELECTRIC MOTORS Orval 0.. Bond, Santa Barbara,.Galif..

Applica-tibn April 22, 1947, Serial: No. 743;l'03.

3 Claims. (01. 2099-358) .and used simultaneously-with theoperation of the mix rr A further object of the inventioniis the, provision of such,- a device provided. with, a plurality of sifting elements, which may be readily removed: and replaced, thus providing a relatively flexible implement, characterized by a plurality of" sifting combinations.

An additional object of theinvention is the provision of suchadevice which is sturdy and durable in construction; reliable and eiiicient in operation, relatively simple and inexpensive to manufacture, assemble and utilize, and which may be applied to and connected with a conventionalelectric-mixer witha-minimurn'of effort and difficulty Still'other objects will in part be obviouaand in part be pointed out as the description of the invention-proceeds, and shownin the accompanying drawings, wherein there is disclosed a preferred. embodiment of this-inventive concept.

In the drawings:

Figure, 1 is a vertical sectional view taken substantially, through the center line. of one form ofdevice embodying features ofthe instant invention, shown in association with a conventional electric mixer, parts of the latter being broken away.

Figure 2 is a sectional view taken substantially along the line 22 of Figure 1, as viewed in the direction indicated by the arrows.

Figure 3 is a sectional view taken substantially along the line 3-3 of Figure 1, as viewed in the direction indicated by the arrows.

Figure 4 is a fragmentary side view, partially broken away, showing a constructional detail.

Figure 5 is an enlarged fragmentary sectional view taken substantially along the line 5-5 of Figure 4, as viewed in the direction indicated by the arrows.

Similar reference characters refer to similar parts throughout the several views of the drawings.

Referring now to the drawings in detail, there is generally indicated at it an electric food mixer of 2 any desired conventional typaincludingra motfcn head II, a supporting; stand l2, an-.elec tri'c.:.con1- necting cord In, and a power take oif; litter: con ventional: design, providedwith a slot. t5; for; CD11?" nection; with any desired? implement, in normal use of the device; a fruit-juicing attachment;

The device of the instant, invention; includesa bracket it, providedwith. a seating; ring; 111;. adapted; to engage, ina recess; in. the. top of; the. device adjacent the power: talee-o'fifii ILL, bracket hassecured thereto, as by meanaof: a set screw l8, an. arcuatetube i9; within; which positioned a flexible drive shaft. 20;, the; latter; lire.- ing. provided with .atongue. 2.1 for. engagement: with the slot I55; of the. powertake-on; in such-i manner that, energization; of. the. power takEr-Ofi. will: drive the; flexible: shaft. The. opposite: end: of: the member Iii-extends in an arc to. a. collar 25.. carried by radially; extending supporting strips 26 mounted; in the; upper; portiom on a tubular flour sitter 2i The: parts may. be. heldrinrelated: assembly as'by meansofi aset screw-2B; and the. opposite end: of thefiexible drive; shaft; Zll: engages a. tongue; 2 i i-integrally asso ciated. with: a rotatable shaft-3:9, extending downwardly along. the: center.

line: of? receptacle; 2L and being providedv at; its;

lower extremity witna circular. portion: 3li journaledfoprotation: in a socket: 32.1 carried byradis ally; extending, members. es; diametrically posi.:-- tioned across the; bottom, of! the receptacle 2 1;

Interiorly Of receptacle. 2?, adjacent the base. thereof, ,is' a: ring 35,-, uponiw-hich is adapted to ;-bepositionedv a1 sifting. screen. 36; engageable by. an.

rotatable; blade. member 3.1; having. a: collar 38 provided; with. a squared. aperture surrounding the shaft. 3.0.; If; desired; a spacer-ring 39 may be mounted on the screen 36 to carry an additional sifting screen 40, a collar ll, and blade 42, corresponding to blades 31 and collars 38. A further spacing ring 43 similar to the ring 39 may carry an additional ring 44, provided with a further rotatable blade 45 carried by a collar 46.

Obviously, the arrangement is such that any of the blades or their associated screens and spacer rings may be omitted if desired, and screens of varying meshes may be readily substituted for any or all of the previously described screens.

As best shown in Figure 5, means are provided for securing the blades against longitudinal displacement on the shaft 3d, and take the form of a ball 56 seated in a recess in each of collars 38, ll, and AS, the ball being spring pressed, as by means of a spring 5: into engagement with a recess or detent 52 in the side of the shaft 30',

'From the foregoing, it will now be seen that there is herein provided an improved powerdriven flour sifter, readily adapted to wide flexibility of arrangement, which accomplishes all the objects of this invention, and others, including many advantages of great practical utility and commercial importance.

As many embodiments may be made of this inventive concept, and as many modifications may be made in the embodiment hereinbefore shown and described, it is to be understood that all matter herein is tobe interpreted merely as illustrative and not in a limiting sense.

I claim:

1. A flour sifter attachment for a motor food mixer having an opening in an upper part thereof and a motor driven shaft exposed in said opening, said attachment comprising a horizontally elongated bracket having a depending tubular bushing on one end adapted to be inserted in said mixer opening for supporting said bracket in laterally extending position on said mixer, a vertical sifter cylinder n the opposite or outer'end of said bracket, a vertical sifter shaft supported for rotation in said cylinder and having agitator blades, a flexible shaft arched between the upper end of said sifter shaft and said driven shaft and extending downwardly through said tubular bushing, and means operatively connecting the related ends of said flexible shaft to said driven shaft and the upper end of said sifter shaft, respectively, said bracket comprising an upwardly arched handle for carrying said attachment when disconnected from said food mixer, said handle comprising an upwardly arched tube spacedly surrounding said flexible shaft and fixed at its opposite ends to portions on said bracket in protective relation to said flexible shaft.

2. A flour sifter attachment for a motor food mixer having an opening in an upper part thereof and a motor driven shaft exposed in said opening, said attachment comprising a horizontally elongated bracket having a depending tubular bushing on one end adapted to be inserted in said mixer. opening for supporting said bracket in laterally extending position on said mixer, a vertical sifter cylinder on the opposite or outer end of said bracket, a vertical sifter shaft supported for rotation in said cylinder and having agitator blades, a flexible shaft arched between the upper end of said sifter shaft and said driven shaft and extending downwardly through said tubular bushing, and means operatively connecting the related ends of said flexible shaft to said driven shaft and the upper end of said sifter shaft, respectively, said bracket comprising an upwardly arched han- 4 dle for carrying said attachment when discon nected from said food mixer, said handle comprising an upwardly arched tube spacedly surrounding said flexible shaft and fixed at its opposite ends to portions on said bracket in protective relation to said flexible shaft, the end of said arched tube adjacent to said sifter shaft having a tubular bushing rotatably receiving the upper end of said sifter shaft and the adjacent end of said flexible shaft.

3. A flour sifter for attachment to a power takeoff shaft of a motor driven food mixer comprising a horizontally disposed bracket,'a vertically dis posed sifter cylinder positioned adjacent one end of said bracket and dependingly supported therefrom, sifting means including a vertically disposed rotatable shaft positioned within said cylinder, an open-ended arcuate tubular handle having one end positioned in alignment with respect to said rotatable shaft and secured to said cylinder, the other end of said tubular handle bein aligned with said power take-01f shaft and supported in said bracket adjacent its other end, and flexible coupling means disposed within said tubular handle having one end operatively connected to said shaft and having the other end adapted to be coupled to said power take-off shaft.

The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 151,232 Marvin May 26, 1874 250,197 Bra-chner NOV. 29, 1881 310,405 Fuller Jan. 6, 1885 454,323 Binau June 16, 1891 482,576 Ingram Sept. 13, 1892 525,138 Detwiler Aug. 28, 1894 544,256 Iddings Aug. 6, 1895 927,697 Wantling July 13, 1909 1,082,243 Shelton Dec. 23, 19 3 1,391,145 Smetana Sept. 20, 1921 1,446,235 Wobst Feb. 20, 1923 1,868,587 Richards July 26, 193 2,074,162 Bowman Mar. 16, 1937 2,153,879 Andrews Apr. 11, 1939 2,213,719 Repath et a1 Sept. 3, 1940 FOREIGN PATENTS Number Country Date 202,732 Germany Oct. 1, 1908 

